Answer:
The test statistic is 
Step-by-step explanation:
We are interested in determining whether or not the proportion of the student who experience anxiety during the exam is significantly more than 80%.
At the null hypothesis, we test if the proportion is 80%, that is:

At the alternate hypothesis, we test if the proportion is more than 80%, that is:

The test statistic is:

In which X is the sample mean,
is the value tested at the null hypothesis,
is the standard deviation and n is the size of the sample.
80% is tested at the null hypothesis:
This means that 
A random sample of 100 students was taken. Eighty-five of the student in the sample experienced anxiety during the exam.
This means that 
The test statistic is



The test statistic is 
9/3x = 5/8
Using the reciprocal, multiply each side by 3/9.
5/8 * 3/9 = 15/72
Simplify it : 5/24
x = 5/24
Hope this helps :)
The answer to the problem is
y=1/2x
4/5 > 2/7 is the answer
God bless!
Answer: 75% 45/60 is .75 witch is 75%
Step-by-step explanation: